Mom and Dad.

**Please correct any of my English if possible thank you so much! ^_^**

Me: "Mom, I am sorry that I haven't been able to come back home often recently."
My mom: "It's ("it is" looks and sounds very weird here) okay. Don't worry. I would rather you just focused on your studies/on studying"
Me: "Okay."

(My mind: Feeling bad and wondering if my mom is really fine.)  this kind of thing is always hard to put into writing. I would write:

"Okay". (But really/but on the inside, I feel bad and I am wondering if my mum is really ok)

Sometimes, when I see my friends call their mom over the phone every day, it makes want to call my mom every day too. I am afraid that I am not treating my parents well enough if I don't call them often.

Although I call my parents rarely (around 1-3 times a week), my mom's reaction still was along the lines of "like" is ok for very colloquial/teenager English but "along the lines of" is always better.

"Why are you calling? You don't have any assignments to do, right?", haha.

I don't really call her that often though. I just don't want to hurt her feelings if I don't call her often repeating "often" a lot here! but her reaction each time makes me confused as to whether she wants me to call her or not hehe. 

As for my dad, he always sounded as though he wanted to ended the call as soon as possible, haha. I guess a call is just too awkward for some dads, hehe. But things like that are quite cute though. I still remember the way my dad would look at me from afar when I was lost while searching for my school bus when I was 9 years old.

Great sentence! But it's a bit long for one sentence. Better would be:

Back when I was 9 years old, I would always get lost trying to find my school bus. I still remember the way my dad would watch me from afar/from a distance. 

It still fascinates me how I can fail to find my own school bus when I already know it's just in front of the gate? Luckily my father was stalking from afar. Haha, strange choice of word. Just like a superhero. I am super embarrassed at that time when I saw my father was watching from afar since I confidently said "Of course I will be fine! I can find my own bus!" the day before. I saw my dad and suddenly remembered where my bus was located. So, you must look out for your little children even when they say that they will be just fine. :P

Very good writing!

Note: Stalking implies harassment, creepiness, unless you are using it for humour :)